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Finding the Fourth Proportional to 15,689.73, 21,652.35 and 8,975.37

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Solution

The fourth proportional to 15,689.73, 21,652.35 and 8,975.37 is: 12,386.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.73 : 21,652.35 = 8,975.37 : x
  2. Step 2: Convert to fraction form
    15,689.73/21,652.35 = 8,975.37/x
  3. Step 3: Cross multiply
    15,689.73x = 21,652.35 × 8,975.37
  4. Step 4: Simplify right side
    15,689.73x = 194,337,852.62
  5. Step 5: Solve for x
    x = 194,337,852.62/15,689.73
  6. Step 6: Final answer
    x = 12,386.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.